Connecting plug



Jan. 8 1924.

L. G. PAQZENT CONNECTING PLUG Filed March 20, 1923 Patented Jan. 8, 1924.

- UNITED STATES 1,480,007 PATENT OFFICE.

LOUIS G. PACENT, OF WINFIELD, NEW YORK, ASSIGNOR TO PACENT ELECTRIC COM- PANY, INQ, OF NEW YORK, Y., A CORPORATION OF NEW YORK.

CONNECTING PLUG.

I Application filed March 20, 1923. Serial No. 626,285.

To all whom it may concern:

Be it known that I, LOUIS G. PACENT, a citizen of the United States, residing at 'infield, in the county of Queens, State of 5 New York, have invented certain new and useful Improvements in Connecting Plugs; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in H the art to which it appertains to make and use the same.

This invention has to do with connecting plugs, and, more particularly, telephone plugs. Its object is to prov de a very s m- I5 ple' and inexpensive connecting (plug which is adapted to be readily connecte to the terminals of a telephone cord of the kind providedwith pin type cord tips.

At the present time the invention finds its most important embodiment in telephone plugs for use in conjunction with radio apparatus. Radio telephone head-sets are ordinarily provided with conductor cords having so-called pin type cord tips which of course are not adapted for making connections with spring jacks, but are particularly well adapted for making connectlons with certain types of binding posts and sprlng clips, such as the Well-known Fahnestock 0 clips. Because of the fact that it 1s frequently desirable to connect a telephone cad-set with binding posts and the like,

Z ecially for experimental and testing purposes, it is undesirable in many cases to have 5 the headset permanently connected to the plug. The structure of the present invention is designed to meet this situation 1n that it provides a plug to which a cord provided with the usual pin type cord ti 5 can be quickly and easily connected and isconnected and in which the entire mechanism for effecting such connections is mounted inside the handle of the plug.

In connection with the detailed description of the invention to follow, reference is made to the accompanying drawing, in which- Fig. 1 is an exterior elevational view illustrating the preferred embodiment of the invention;

A Fig. 2 is a side elevation of the same plu Fig. 3 is an elevational view with one-ha f of the plug handle removed in order to more clearly disclose the interior structure;

Fig. 4 is an elevational view partly in cross section of the plug with the handle removed illustrating the first step in the operation of connecting the telephone cords to the plug; and

Fig. 5 is a cross sectional view taken along the line 5-5 of Fig. 3.

The illustrated embodiment of the invention comprises a contact member 1 consistmg of a tip 2 and sleeve 3 insulated from each other by means of suitable insulating bushings and washers. The tip 2 is connected to the end of a threaded stud 4, which extends through the sleeve'3 and is provided at its end with a nut 5. A pair of curved resilient members 6 and 7 are connected respec- 7o tively to the sleeve 3 and stud 4;. the latter being connected with the tip 2. The resilient members 6 and '7 normally assume the form indicated in Fig. 4, and the free end portion of each of these members is provided with an 5-.) 1 aperture of suitable size to permit the insertion therein of a pin type cord tip 8. The handle of the plug is preferably molded of a suitable insulating material such as hard rubber or a phenolic condensation product, and consists of two identical portions 9 and 10, which fit together and form a chamber for containing the resilient members.6 and 7, as is best-illustrated in Fig. 3. Theftwo parts of the handle are secured together by means of a screw 12.

In connecting the telephone cord to the plug, the cord tips are inserted in the flpvktures in the resilient members 6 and 7. as shown in Fig. 4:, after which they are twisted into the position shown in Fig. 3, thereby flexing the resilient members. One of the pprtions of the handle such as 9 may then put in place with the cord tips seated in the grooves provided for them, as is clearly illustrated in Fig. 3. The other half of the handle 10 may then be put in place and the two parts screwed together. The resilient members 6 and 7 being under considerable tension, the cord tips are securely gripped by the edges of the apertures in the resilient members through which the extend. Any force applied tending to wit draw the cord tips from the plug only tends to increase the gripping action of the resilient members 6 and 7 thereon, and it is quite impossible to remove the cord tips without removin the handle. This, however, is a very easy t in to do, since it requires only the remova of a single screw. When the two parts of no 

